occlusal projections

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Occlusal Projections Image Field Projection of Central Ray Point of Entry Anterior Maxillary Occlusal Projection Anterior maxilla and dentition Anterior floor of the nasal floor Canine to canine Vertical angulation (+45 deg) Horizontal angulation (0 deg) Tip of nose toward middle of receptor Topographical Maxillary Occlusal Projection Palate Zygomatic process of the axilla Anteroinferior aspects of maxillary sinus Nasolacrimal canals Second molar to second molar Nasal septum Vertical angulation (+65 deg) Horizontal angulation (0 deg) Bridge of nose just below the nasion towards middle of the receptor Lateral Maxillary Occlusal Projection Quadrant of alveolar ridge of the maxilla Inferolateral of the maxillary sinus Tuberosity Lateral incisor to contralateral third molar Zygomatic process superimposed over the roots Receptor long axis parallel to the sagittal plane Receptor extend laterally 1 cm past the buccal cusps Vertical angulation (+60 deg) Horizontal angulation (0 deg) 2 cm below the lateral canthus of the eye towards center of the receptor Anterior Mandibular Occlusal Projection Anterior portion of the mandible Canine to canine Inferior cortical border of the mandible Seat patient tilted back so occlusal plane 45 deg above horizontal Vertical angulation (-10 deg) This give the ray -55 deg of angulation to the plane of the receptor Horizontal angulation (0 deg) Midline and through the tip of the chin Topographical Mandibular Occlusal Projection Soft tissue of the floor of the mouth Lingual and buccal plates of the mandible Second molar to second molar Exposure time is reduced to half the time Seat the patient in a semi- reclining position Head tilted back so that the ala- tragus line is almost perpendicular to the floor Anterior border of the receptor Midline through the floor of the mouth 3 cm below the chin

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Occlusal Projections

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Page 1: Occlusal Projections

Occlusal Projections

  Image Field Projection of Central Ray Point of Entry

Anterior Maxillary Occlusal Projection Anterior maxilla and dentition Anterior floor of the nasal floor Canine to canine

Vertical angulation (+45 deg) Horizontal angulation (0 deg)

Tip of nose toward middle of receptor

Topographical Maxillary Occlusal Projection Palate Zygomatic process of the axilla Anteroinferior aspects of maxillary sinus Nasolacrimal canals Second molar to second molar Nasal septum

Vertical angulation (+65 deg) Horizontal angulation (0 deg)

Bridge of nose just below the nasion towards middle of the receptor

Lateral Maxillary Occlusal Projection Quadrant of alveolar ridge of the maxilla Inferolateral of the maxillary sinus Tuberosity Lateral incisor to contralateral third molar Zygomatic process superimposed over the roots

Receptor long axis parallel to the sagittal plane Receptor extend laterally 1 cm past the buccal 

cusps Vertical angulation (+60 deg) Horizontal angulation (0 deg)

2 cm below the lateral canthus of the eye towards center of the receptor

Anterior Mandibular Occlusal Projection Anterior portion of the mandible Canine to canine Inferior cortical border of the mandible

Seat patient tilted back so occlusal plane 45 deg above horizontal

Vertical angulation (-10 deg) This give the ray -55 deg of angulation to 

the plane of the receptor Horizontal angulation (0 deg)

Midline and through the tip of the chin

Topographical Mandibular Occlusal Projection

Soft tissue of the floor of the mouth Lingual and buccal plates of the mandible Second molar to second molar Exposure time is reduced to half the time

Seat the patient in a semi-reclining position Head tilted back so that the ala-tragus line is 

almost perpendicular to the floor Anterior border of the receptor should be 1 cm 

beyond the mandibular central incisors

Midline through the floor of the mouth 3 cm below the chin

Lateral Mandibular Occlusal Projection Soft tissue of half of the floor of the mouth Buccal and lingual cortical plates of half of the 

mandible Lateral incisor to contralateral third molar Exposure time is reduced to half the time

Seat the patient in a semi-reclining position Head tilted back so that the ala-tragus line is 

almost perpendicular to the floor Receptor long axis parallel to the sagittal plane Receptor extend laterally 1 cm past the buccal 

cusps

Below the chin 3 cm posterior to 

the chin 3 cm lateral to the 

midline